CVE-2026-91003 D-Link DI-8300 CGI Service rzgl.asp rzgl_asp stack-based overflow
Remote attackers can execute arbitrary code on D-Link DI-8300 routers via a stack-based buffer overflow in the CGI service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91003?
CVE-2026-91003 is a critical memory corruption vulnerability in D-Link DI-8300, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzgl_asp of the file /rzgl.asp of the component CGI Service. This manipulation of the argument redirct_url causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Which versions are affected by CVE-2026-91003?
How do I fix CVE-2026-91003?
No fix has been published for CVE-2026-91003 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-91003 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91003 exists.
Sources
Also known as GHSA-p599-cqm7-c2xh.